So I updated to beta 4 Tuesday night and yesterday MobileMe seemed to work ok, about the same as it did with beta 3, push was a bit sluggish at times but not too bad. Today I am having a difficult time sending emails from my phone and I'm receiving emails at least an hour after they were sent. Sometimes I'm receiving them twice, still an hour or more late. Anyone else experiencing this? Wondering if it's a beta 4 issue or a MobileMe issue. I have deleted and re-added my mobile me account, didn't help.